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  Optical viewfinder of a camera having a function of taking photographsUSPTO Application #: 20070086775Title: Optical viewfinder of a camera having a function of taking photographs Abstract: The present invention discloses an optical viewfinder of a camera having the function of taking photographs, and the viewfinder comprises an objective module, a base, an eyepiece module and an upper casing. The objective module and the eyepiece module are fixed onto the front end and rear end of the base respectively and the upper casing is connected between the objective module and the eyepiece module and disposed in the middle section of the base. The simple structure of the invention is designed according to the principle of optical reflection and features a high resolution, an easy installation, and a convenient production, and the optical viewfinder is extensively used for cameras to substitute a high-cost electronic LCD screen. (end of abstract) Agent: Troxell Law Office PLLC One Skyline Place - Falls Church, VA, US Inventor: Claire Lee Jung Kuo USPTO Applicaton #: 20070086775 - Class: 396373000 (USPTO) Related Patent Categories: Photography, With Viewfinder The Patent Description & Claims data below is from USPTO Patent Application 20070086775. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a viewfinder, and more particularly to an optical viewfinder of a camera having a function of taking photographs, and the optical viewfinder comes with a module design and thus is convenient to produce and manufacture and can achieve the effect of lowering the manufacturing costs. [0003] 2. Description of the Related Art [0004] Most of the present camera viewfinders having the function of taking photographs are electronic viewfinders (EVF), and their operation principle is to install a micro liquid crystal display (LCD) inside the viewfinder sheltered by a camera body and hood, so that the external light will not be projected onto the micro LCD, and a user can see the micro LCD through an eyepiece of the viewfinder. [0005] However, the present electronic viewfinder has a shortcoming that its display quality is inferior to that of a single-lens reflective camera, and the sharpness and the color of the pictures taken are not as good as that of the ones taken by the camera due to a lower resolution, so that the pictures taken will be rougher and include damascene. In addition, the electronic viewfinder cannot display the details of a picture taken, such as the eyes of a person are closed or opened, etc. Furthermore, the manufacturing cost of the electronic viewfinder is higher and the technology is more complicated, and improvements are needed for the electronic viewfinders of this sort. SUMMARY OF THE INVENTION [0006] In view of the forgoing shortcomings of the prior art, the inventor of the present invention based on years of experience in the design and sales of electronic viewfinders to conduct extensive researches and experiments to overcome the shortcomings of the prior art electronic viewfinders and greatly reduce the manufacturing cost, and finally invented an optical viewfinder of a camera having a function of taking photographs in accordance with the present invention. [0007] The primary objective of the present invention is to provide an optical viewfinder of a camera having a function of taking photographs that uses the principle of optics to design an optical viewfinder to meet consumer requirements. In the meantime, the optical viewfinder of the invention is easy to produce and install, which can substitute the high-cost electronic LCD screen, and thus can greatly reduce costs to satisfy consumer requirements. [0008] To achieve the foregoing objective, the solution of the present invention resides on that: [0009] An optical viewfinder of a camera having a function of taking photographs comprises: an objective module having an object lens installed in a fixed base and a clamping ring engaged onto an opening at the front end of the objective module; a base, being a base body having an open top and a rectangular aslant surface therein for fixing a reflective mirror and reflecting the light received by the object lens; an eyepiece module installing a ground-glass eyepiece disposed at an upper casing of an aslant rear cylinder having an open bottom for focusing, so as to form the images thereon, having a plane glass lens engaged to an opening of a viewfinder frame at the rear of the upper casing of the rear cylinder, and a rear section of the bottom being coupled with a lower casing of the rear cylinder; and an upper casing of a front cylinder being a cover with an open bottom; such that the objective module and the eyepiece module are fixed to the front end and the rear end of the base respectively, and the upper casing of the front cylinder is disposed between the objective module and the eyepiece module and fixed to the middle section of the base. [0010] Another objective of the present invention is to provide an optical viewfinder of a camera having a function of taking photographs, wherein the optical viewfinder is fixed and installed to the camera by a connecting means. [0011] A further objective of the present invention is to provide an optical viewfinder of a camera having a function of taking photographs, wherein the fixed base includes an external decorative ring coupled to a base edge extended in a radial direction from the front of the fixed base, and the base includes at least two base pillars or base holes disposed at the front end of the base, and the fixed base includes a corresponding base wing or base pillars, and both being coupled by a connecting means such that the objective module is fixed to the front end of the fixed base. [0012] Another further objective of the present invention is to provide an optical viewfinder of a camera having a function of taking photographs, wherein the viewfinder frame installs a viewfinder rubber. In addition, the upper casing of the rear cylinder includes a cover wing extended downward from the front end and rear end of the upper casing of the rear cylinder and inserted into a wing groove at a lower casing of the rear cylinder, and both being coupled by a connecting means, such that the lower casing of the rear cylinder is fixed to the rear section of the upper casing of the rear cylinder. Further, the lower casing of the rear cylinder includes a wing plate protruded from the front end of the lower casing of the rear cylinder, and the base includes a plate hole disposed on a sidewall at the rear end of the base, and both being coupled by a connecting means, such that the eyepiece module is fixed to the rear end of the base. [0013] Another objective of the present invention is to provide an optical viewfinder of a camera having a function of taking photographs, wherein the ground glass eyepiece is made of a plane ground glass, or the ground glass eyepiece is made of a spiral ground glass. [0014] Another further objective of the present invention is to provide an optical viewfinder of a camera having a function of taking photographs further comprising a control section, and the control section includes a button cover installed between the base and the upper casing of the front cylinder, and the button cover includes a focus button and a shutter. BRIEF DESCRIPTION OF THE DRAWINGS [0015] Referring to FIG. 1 to FIG. 5, it will provide more detailed technology of the invention. [0016] FIG. 1 is an exploded view of an optical viewfinder of the invention; [0017] FIG. 2 is a schematic view of the modules of an optical viewfinder of the invention; [0018] FIG. 3 is a perspective view of an optical viewfinder of the present invention; [0019] FIG. 4 is a cross-sectional view of an optical viewfinder of the invention; and [0020] FIG. 5 is a perspective view of an optical viewfinder being installed onto a camera having a function of taking photographs according to the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Continue reading... Full patent description for Optical viewfinder of a camera having a function of taking photographs Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Optical viewfinder of a camera having a function of taking photographs patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. 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